Conor Mullee vs. Willis Roberts — Career Comparison

On the career pitching numbers, Conor Mullee posted a stronger line than Willis Roberts. Conor Mullee posted stronger numbers in ERA (3 vs 4.64) and WHIP (1.333 vs 1.521). By the career numbers, Conor Mullee had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.